<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
	    <title>我的第二个网页</title>
	    <link rel="stylesheet" href="">
    </head>
	<body>
		<h1 align="center">一级标题</h1>
		<h2 align="center">二级标题</h2>
		<h3 align="left">三级标题</h3>
		<h4 align="right">四级标题</h4>
		<h5>五级标题</h5>
		<h6>六级标题</h6>
		<h7>有七级标题吗？</h7>
 	</body>
</html>
